Schweitzer Engineering Laboratories SEL-387E - SEL-387 E Relay to an SEL Communications Processor; Communications Protocols

7-8 Communications Date Code 20080110
SEL-387E Instruction Manual
SEL-387E Relay to an SEL Communications Processor
Cable C272A
SEL-2032,
SEL-2030, or SEL-2020
9-Pin Male
“D” Subconnector
SEL-387E Relay
9-Pin Male
“D” Subconnector
Cable C273A
SEL-2032,
SEL-2030, or SEL-2020
9-Pin Male
“D” Subconnector
SEL-387E Relay
9-Pin Male
“D” Subconnector
* DTE = Data Terminal Equipment (Computer, Terminal, Printer, etc.)
** DCE = Data Communications Equipment (Modem, etc.)
For communications up to 80 kilometers and for electrical isolation of communications ports,
use the SEL-2800 family of fiber-optic transceivers. Contact SEL for more details on these
devices.
C OMMUNICATIONS P ROTOCOLS
This section explains the communications protocols used by the SEL-387E. You can set and
operate the SEL-387E via the communications ports.
Note: In this document, commands you type appear in bold/upper case: STATUS. Keys you
press appear in bold/brackets: <Enter>.
Relay output appears boxed and in the following format:
XFMR 1 Date: MM/DD/YY Time: HH:MM:SS.SSS
RXD 2
TXD 3
IRIG+ 4
GND 5
IRIG- 6
RTS 7
CTS 8
3 TXD
2 RXD
4 IRIG+
5 GND
6 IRIG-
8 CTS
7 RTS
RXD 2
TXD 3
GND 5
RTS 7
CTS 8
3 TXD
2 RXD
5 GND
7 RTS
8 CTS